# US 11,908,647 B2 · Circuit breaker

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- Number: US 11,908,647 B2
- Document ID: US11908647B2
- Status: Granted
- Kind: B2
- Application number: 17/619,582
- Filed: 2020-07-10
- Published: 2022-12-01
- Granted: 2024-02-20
- Earliest claimed: 2019-07-12
- Assignees: Astotec Automotive GmbH
- Applicants: Astotec Automotive GmbH
- Inventors: Dietmar Haba; Ludwig Marker; Kurt Aigner
- Web page: https://patentgrep.com/patent/US11908647B2

## CPC

- H01H 39/006: {Opening by severing a conductor}
- H01H 9/30: Means for extinguishing or preventing arc between current-carrying parts
- H01H 9/342: {Venting arrangements for arc chutes}
- H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00)

## Abstract

A disconnect has a housing defining a cavity, a busbar fixed in the housing and extending through the cavity, a piston movable in the cavity past the piston for breaking a piece out of the busbar, and a plurality of metallic filter elements exposed in the cavity below the busbar and electrically connecting with the piece on activation of the disconnect. An igniter displaces the piston in the cavity into engagement with and past the busbar so as to break the piece out of busbar and displace it past the filter elements such that an arc created by breaking out the piece is drawn by the piece away from the busbar and energy of the arc heats and is dissipated in the filter elements.

## Claims

### Claim 1

A disconnect comprising:
a housing defining a cavity;
a busbar fixed in the housing and extending through the cavity;
a piston movable in the cavity past the piston for breaking a piece out of the busbar;
a plurality of metallic filter elements exposed in the cavity below the busbar and electrically connecting with the piece on activation of the disconnect; and
means for displacing the piston in the cavity into engagement with and past the busbar so as to break the piece out of busbar and displace it past the filter elements such that an arc created by breaking out the piece is drawn by the piece away from the busbar and energy of the arc heats and is dissipated in the filter elements.

### Claim 2 (depends on 1)

The disconnect according to claim 1, further comprising:
dielectric insulation between the filter element and the busbar when the disconnect is not tripped and the piston has not broken the piece out of the busbar.

### Claim 3 (depends on 1)

The disconnect according to claim 1, wherein the filter elements are metallic and on both sides of the piston below the busbar, so that the piece electrically connects the filter elements when the disconnect is tripped.

### Claim 4 (depends on 3)

The disconnect according to claim 3, wherein the piece remains between or leaves the filter elements after the disconnect has been tripped.

### Claim 5 (depends on 1)

The disconnect according to claim 1, wherein an extinguishing agent is additionally provided in the disconnect.

### Claim 6 (depends on 5)

The disconnect according to claim 5, wherein the extinguishing agent is a silicon compound.

### Claim 7 (depends on 6)

The disconnect according to claim 6, wherein the extinguishing agent is a silicone oil or a silicone-containing grease.

### Claim 8 (depends on 1)

The disconnect according to claim 1, wherein the housing is formed with recesses opening into the cavity in the housing between the busbar and the filter elements.

### Claim 9 (depends on 1)

The disconnect according to claim 1, wherein the housing is sealed.

### Claim 10 (depends on 1)

The disconnect according to claim 1, wherein the filter elements are insulated from the outside environment.

### Claim 11 (depends on 1)

The disconnect according to claim 1, wherein further filter elements flank the busbar.

### Claim 12 (depends on 1)

The disconnect according to claim 1, wherein the filter element is formed of stainless-steel filaments.